<template>
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>
    <el-steps :active="2" process-status="wait" align-center style="marginbottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>
    <el-form label-width="120px">
      <el-button type="text" @click="dialogChapterFormVisible = true; clean()">添加章节</el-button>
      <!-- 添加和修改章节表单 -->
      <el-dialog :visible.sync="dialogChapterFormVisible" :title="formTitle">
        <el-form :model="chapter" label-width="120px">
          <el-form-item label="章节标题">
            <el-input v-model="chapter.title"/>
          </el-form-item>
          <el-form-item label="章节排序">
            <el-input-number v-model="chapter.sort" :min="0" controlsposition="right"/>
          </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
          <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
          <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
      </el-dialog>
      <!-- 章节 -->
      <ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList"
            :key="chapter.id">
          <p>
            {{ chapter.title }}
            <span class="acts">
              <el-button type="text"
                         @click="dialogVideoFormVisible = true; chapterId =chapter.id;clean()">添加课时</el-button>
               <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
               <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
            </span>
          </p>
          <!-- 视频 -->
          <ul class="chanpterList videoList">
            <li
                v-for="video in chapter.children"
                :key="video.id">
              <p>{{ video.title }}
                &nbsp;&nbsp;&nbsp;&nbsp;
                <i class="el-icon-sold-out" v-if="video.isFree===0"></i>
                <span class="acts">
                   <el-button type="text" @click="openEditVideo(video.id)">编辑</el-button>
                   <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                 </span>
              </p>
            </li>
          </ul>
        </li>
      </ul>
      <div>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
      </div>
    </el-form>
    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" :title="formTitle2">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controlsposition="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.isFree">
            <el-radio :label="1">免费</el-radio>
            <el-radio :label="0">收费</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="上传视频">
          <el-upload
              :on-success="handleVodUploadSuccess"
              :on-remove="handleVodRemove" :before-remove="beforeVodRemove"
              :on-exceed="handleUploadExceed"
              :file-list="fileList"
              :action="BASE_API+'eduvod/video/upvod'"
              :limit="1"
              class="upload-demo">
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
              <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传
              </div>
              <i class="el-icon-question"/>
            </el-tooltip>
          </el-upload>
          <span>{{ this.video.videoOriginalName }}</span>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary"
                   @click="saveOrUpdateVideo">确 定
        </el-button>
      </div>
    </el-dialog>
  </div>
</template>
<script>
import chapter from "@/api/chapter";
import video from "@/api/video";

export default {
  data() {
    return {
      dialogChapterFormVisible: false, //是否显示章节表单
      chapter: {// 章节对象
        title: '',
        sort: 0
      },
      saveBtnDisabled: false, // 保存按钮是否禁用
      courseId: '',
      chapterVideoList: [],
      formTitle: '',
      saveVideoBtnDisabled: false, // 课时按钮是否禁用
      dialogVideoFormVisible: false, // 是否显示课时表单
      chapterId: '', // 课时所在的章节id
      video: {// 课时对象
        title: '',
        sort: 0,
        isFree: 0,
        videoSourceId: '',
        videoOriginalName: ''
      },
      formTitle2: '添加小节',
      fileList: [],//上传文件列表
      BASE_API: process.env.BASE_API // 接口API地址
    }
  },
  created() {
    if (this.$route.params && this.$route.params.id) {
      this.courseId = this.$route.params.id
      console.log(this.$route.params.courseId)
      this.getChapterVideo()
    }
  },
  methods: {
    beforeVodRemove(file, fileList) {
      return this.$confirm(`确定移除 ${file.name}？`)
    },
    handleVodRemove(file, fileList) {
      console.log(file)
      video.removeById(this.video.videoSourceId).then(response => {
        this.$message({
          type: 'success', message: "删除视频成功！"
        })
        this.fileList = []
      })
    },
    //成功回调
    handleVodUploadSuccess(response, file, fileList) {
      this.video.videoSourceId = response.data.videoId
      this.video.videoOriginalName = file.name
    },
    //视图上传多于一个视频
    handleUploadExceed(files, fileList) {
      this.$message.warning('想要重新上传视频，请先删除已上传的视频')
    },
    saveOrUpdateVideo() {
      this.saveVideoBtnDisabled = true
      this.fileList = []
      if (!this.video.id) {
        this.saveDataVideo()
      } else {
        this.updateDataVideo()
      }
    },
    saveDataVideo() {
      this.video.courseId = this.courseId
      this.video.chapterId = this.chapterId
      video.addVideo(this.video).then(response => {
        this.$message({
          type: 'success',
          message: '保存成功!'
        })
        this.helpSaveVideo()
        this.getChapterVideo()
      })
    },
    updateDataVideo() {
      video.updateVideo(this.video).then(res => {
        this.$message({
          type: "success",
          message: '修改小节节信息成功！'
        })
        this.helpSaveVideo()
        this.getChapterVideo()
      })
    },
    helpSaveVideo() {
      this.dialogVideoFormVisible = false// 如果保存成功则关闭对话框this.fetchChapterNestedListByCourseId()// 刷新列表
      this.video.title = ''// 重置章节标题
      this.video.sort = 0// 重置章节标题
      this.video.videoSourceId = ''// 重置视频资源id
      this.saveVideoBtnDisabled = false
    },
    removeVideo(id) {
      this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消', type: 'warning'
      }).then(() => {
        return video.delVideoInfo(id)
      }).then(() => {
        this.getChapterVideo()// 刷新列表
        this.$message({
          type: 'success',
          message: '删除成功!'
        })
      }).catch((response) => { // 失败
        if (response === 'cancel') {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        } else {
          this.$message({
            type: 'error',
            message: response.message
          })
        }
      })
    },
    removeChapter(chapterId) {
      this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消', type: 'warning'
      }).then(() => {
        return chapter.delChapterInfo(chapterId)
      }).then(() => {
        this.getChapterVideo()// 刷新列表
        this.$message({
          type: 'success',
          message: '删除成功!'
        })
      }).catch((response) => { // 失败
        if (response === 'cancel') {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        }
      })
    },
    openEditChatper(id) {
      this.formTitle = '编辑章节'
      chapter.getChapterInfo(id).then(res => {
        this.dialogChapterFormVisible = true
        this.chapter = res.data.chapter
      })
    },
    openEditVideo(id) {
      this.formTitle2 = '编辑小节'
      video.getVideoInfo(id).then(res => {
        this.dialogVideoFormVisible = true
        this.video = res.data.video
      })
    },
    clean() {
      this.formTitle = '添加章节'
      this.formTitle2 = '添加小节'
      this.chapter = {}
      this.video = {}
    },
    saveOrUpdate() {
      this.chapter.courseId = this.courseId
      if (this.chapter.id == null) {
        chapter.addChapter(this.chapter).then(res => {
          this.dialogChapterFormVisible = false
          this.$message({
            type: "success",
            message: '添加章节信息成功！'
          })
          this.getChapterVideo()
        })
      } else {
        chapter.updateChapter(this.chapter).then(res => {
          this.dialogChapterFormVisible = false
          this.$message({
            type: "success",
            message: '修改章节信息成功！'
          })
          this.getChapterVideo()
        })
      }
    },
    getChapterVideo() {
      chapter.getAllChapterVideo(this.courseId).then(res => {
        this.chapterVideoList = res.data.chapterList
      })
    },
    previous() {
      console.log('previous')
      this.$router.push({path: '/course/info/' + this.courseId})
    },
    next() {
      console.log('next')
      this.$router.push({path: '/course/publish/' + this.courseId})
    }
  }
}
</script>
<style scoped>
.chanpterList {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.chanpterList li {
  position: relative;
}

.chanpterList p {
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}

.chanpterList .acts {
  float: right;
  font-size: 14px;
}

.videoList {
  padding-left: 50px;
}

.videoList p {
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}
</style>
